Copolymers with nitrogen groups, useful as additives for decreasing the cloud point of hydrocarbon middle distillates and compositions containing them
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United States of America Patent
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Apr 16, 1985
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N/A
app pub date -
Nov 9, 1983
filing date -
Nov 9, 1982
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Expired
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Abstract
Copolymers with nitrogen groups are used as additives to lower the cloud point of middle distillates such as gas oils. They are obtained by reacting a compound having a primary amine group with a copolymer comprising from 20 to 40% of recurrent units from a linear .alpha.-olefin, from 30 to 70% of recurrent units from an .alpha.,.beta.-unsaturated dicarboxylic compound, from 5 to 30% of recurrent units from an alkyl ester of unsaturated monocarboxylic acid, and from 5 to 15% of recurrent units from styrene or a styrene derivative. These additives also improve the limit filterability temperature and the pour point of the middle distillates.
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